Apparatus for testing the balance-wheel units of clocks, watches, etc.



Feb; 25, 1930. F. FRANZ APPARATUS FOR TESTING THE BALANCE WHEEL UNITS CF CLOCKS, WATCHES, ETC

Filed July 14, 1928 5 Sheets-Sheet 1.

In \A Feb; 25, 1930.

F. FRANZ APPARATUS FOR TESTING THE BALANCE} WHEEL UNITS OF CLOCKS, WATCHES, ETC

Filed July 14, 1928 5 Sheets-Sheet 2 T "Feb. 25, 1930. F, F ANZ 1,748,645

APPARATUS FOR TESTING THE BALANCE WHEEL UNITS F CLOCKS, WATCHES, ETC

Filed uly 1 19,28 5 Sheets-Sheet 3 I .W-JL 74L 76137 68 5 9a 7a M 54? """f H I "7 3 Q 77 i 55 ".113 7? 4.2 6 E 30 I 3 I x I Feb. 25, 1930. F. FRANZ 1,748,645

APPARATUS FOR TESTING THE BALANCE WHEEL UNITS 0F CLOCKS, WATCHES, ETC

Filed July 14, 1928 5 Sheets-Sheet 4 Feb. 25, 1930.

-F. FRANZ APPARATUS FOR TESTING THE BALANCE WHEEL UNITS 0F CLOCK5, WATCHES, ETC

Filed July 14, 1928 5 Sheets-Sheet 5 ArPARAr s FOR TESTING rim :eiiLANcn-wHnEnUNIrs F cLocKs, WATCHES, Em,

Patented Feb. 25, 1930 FREDE ICK FRAN or" HAMDEN, coNN c'rioUT, Assn-Non TO THE NEW HAVEN flonoox'oo, on NEW HAVEN, CONNECTICUT, A CORPORATION Applicationfiletl J 'uly 14,

This invention relates to an improvement I in apparatus for testing the'balancerwheel unitsof clocks, watches, etc., to determine by actual trial the proper; length of the'hairspring thereoflbefore lthe unitsvare installed in: the clock watch; m'oyement for which they 1 are intended.

' inaster-moyenient'' for automatically stopping the same; andineans controlled by P Yof operation;

The objectof this invention is to provide angaccuratejancl reliable apparatus of the character referred to 'constructeii' withpa r-i ticular reference to convenience, ease and v With this object in View my sists in an vapparatus tor'jtesting the balancewheelfunitsj of clocks, watches, etc.,,"characterized by its provision with a master-movementancl a plurality of test'moyements, each, of which latter. is adapted to receive a palance-wheelunit to betested-anol is provided with Zone or more indicating-pointers for recording the oscillation of av given un t during a trial period automatic index ng means for restoring the said pointers to normal positiongt starting-anicl-stopping means for starting the -saicl,test movement, and the said.

the said master-movement for'causing the said starting-ancl-stopping' means to stop the said nioyements at the termi'na'tio-n of a test period.

. My invention further consists. in "an apps ratus for testingthe' balance wheel un ts of clocks; watches, etc.,g'characterized asw ahoye l jth ccomp ny d ew s 1 Fig. Iris abroken top or plan gvi'ew halance-wheel-umt testing apparatu's 'con structe'cl in' ,accordance. Wltll' my; invention; I rthe parts be ng shown in their normal positionsof restf;

, FigQ'Q is a yiewthereot i i froiit elevation ;1 "Fig. Sis a View thereoflookingtoward the.

- right-handend of the apparatus p t Fig. 'l'is a' corresponding View looking toward the left hand end oftheaPparatus is an enlargedscale plan view of 1928. serial myeeeyoe; 5

one of the test-movements together with por- I l I tions of the frame, s'tarting ancl -StOpping bar and the'indexing-loar; v V

-;Fi'g. 6v is a side View thereof; 7

Fig. 7 is an enlarged-scale planiview of the mastenmoyementtogetherwith portions gt the frame and the starting-.and-stopping any c Figj8isa sicleview thereof; 'Fig. 9 is aview corresponclin'g to Fig 7; but showing the parts in the positions which they assume after, the starting-ancl-stopping invention con;

bar, together with the starting-ancl-stopping finger, hasmovetl rearward to; start the master-inovementgm 4 q 1 Fig. 10 is a broken top or planview of the outer endof the latchbar showing by broken lines a portion'of the start-ing and-stopping har, together with the latch-pindepending therei ronnvthe partsbeing shown in their normal or at rest position; c Figs."'1 0?, 10 and 10 are corresponding viewsfshowing the positions of the parts as the resultof successive phases of their-movement w 7. .i Fig ll-is a schematic iew-indicating the control-circuit and parts;- and V i Fig l2-is an enlarged-scale "spective yiew of abalanceheel unit ofthe type a clapted to be tested in-the apparatus shown. v

' In carrying .outftny invention as-her' 'ein shown I employ a plurality of corresponding" t test movenientsi (only two of which' are shown) hichcorrespond; in their 111'ain:fea-

- tures s to the clockinoyeinents in which; the v hair-spring and balance-wheel units-"to be I tested a e to--b.e. installed; 1 "The: said test-f moyementslaremounted by' n'eans of i'pillars l6 totheup'per orhorizontal leg'offan angle- I iron frame pjie'ce 17 which extends the enti're lengthot the machine and supports the" yarir drawings comprisesa sme isga balancl.

wheel ls fli'aving an impulse-pin 20 mi a collet 21 to which latter one end of a hairspring 22 is secured in the usual manner. 7

The said balance-wheel unit is designed.

tioned, the impulse-pin of the balancewheel is engaged by an escapement-lever 23 driven in the usual way through a gear-train 24by means of a main-wheel 25 secured to a main-arbor 26 which also has secured to it a ratchet-wheel 27 and a driving-drum 28. The said drum 28 has wrapped around it a drivingecorc 29, one of the ends of which runs over an idler-pulley and has attached to it a driving-weight 31.

The opposite end of the driving-cord 29 rnns'over an idler-pulley 32 and has secured to it a relatively small tension-weight 33. The idler-pulleys 30 and 32 of the several testmovements are mounted upon a long horizontal rod 34 supported in the outer ends of brackets 35 and 36 projecting'rearward from the frame-piece 17. 7

Each test-movement has the upper end of its third-wheel arbor 37 and its esca-pementwheel arbor 38 respectively provided with pointers 39 and 40 frictionally coupled thereto and exposed to view respectively through circular openings 41 and 41' in a guard-plate 42 secured to the upper face of the testmovements and having radial notches 43 intersecting the said openings 41 for the purpose as will hereinafter appear. p

During the operation of removing one balance-wheel unit from the test-movement and before the installing of a new balance wheel unit to be tested, it is desirable to prevent the driving-train 24 from running. For this purpose I provide a back-off finger 44 which is carried by a swinging-lever 45 and is adapted to engage the ratchet-wheel 27 to prevent the rotation of the main-arbor26 as will hereinafter appear.

The said lever 45 is rocked for the purpose just abovementioned, by means of a pin 46 depending from a T-shaped starting-andstopping arm 47which is pivotally mounted upon the underface of a long 'starting-andstopping bar 48 which is adapted to move both longitudinallyand transversely as will be hereinafter described. The said startingand-stopping arm is secured to the startingand-stopping bar by means of a screw-stud 49 which is adjusted so as to yieldingly hold the said arm 47 by friction in any position into which it may be moved.

The forward end of the T-shaped startingand-stopping arm 47 is formed with a trans verse bar 50 having a finger-piece 51 at one end and carrying at its opposite end a resilient starting-and-stopping finger 52 which is positionedso as to engage the periphery of the Since all of the test balance-wheel 19. The swinging movement of the starting-and-stopping arm 47 is limited in one direction by a roller 53 mounted between the movement-plates 54 and 55 of the test-movement while its movement in the oppositedirecti'on is limited by a stop-pin 56 upstanding from an offsetting-arm 57 of the said rear movement-plate 55.

As above stated the starting-and-stopping bar 48 has imparted to it both longitudinal and transverse movements which movements correspondingly effect the starting-and-stopping arms and fingers of each test-movement. To effect the longitudinal movement of the starting-and-stopping bar 48 the right-hand end of the same as'viewed in Figs. 1 and 2 engages the periphery of a disk-cam 58 which is mounted upon a vertical cam-shaft 59 rotating in a bearing 60 secured to the front faceof the frame-piece 17. ,The trans-' verse movement of the said starting-andstopping bar is efiectd by means of a cupouter end'of a short lever-arm 63secured to a rock-shaft 64 extendingbeneath the starting-and-stopping bar 17, parallel therewith and provided near each of its respective opposite ends with an upstanding arm. 65 each of which in turn carries a set-screw 66 engaging the rear edge of the said bar 48 and locked in adjusted position by means of a checknut 67 I V I The right-hand end of the bar 48 and the roller 62 are held in engagement with the respective cams 58 and 61 by means of a pair of diagonallymrranged helical springs .68 connected at one end to the said bar near the respective ends thereof and connected at their opposite ends to guide blocks 69 which upstand from the frame-piece 17 near its respective opposite ends. a

The guide-blocks 69, j ustf above referred to are each formed with forwardly-facing guide-notches 70 which receive and guide the said starting-and-stopping bar 48 near its respective V opposite ends. The said guideblocks are also formed with forwardly-opening guide-notches 71 which in turn receive and guide the opposite ends of an indexingbar 72 which lies parallel with and slightly above and to the rear of the starting-andstopping bar 48 aforesaid.

Adjacent each of the test-movements '15 the forward edge of the indexing-bar 72 is provided with a forwardly-extending indexingarm 7 3, each of which is provided with two depending indexing-fingers 74 and 75, the

lower ends of which are reduced in diameter,

18 parted to-ashort true rectilinear motion as 8 well as'arotary motionfor the purpose of restoring the. pointers 39-and 40 to a zero position with respect tothe graduations marked upon the guard-plate'42 around each of-the openings 41 therein .as will'hereinafter ap vided near its re'ar 'end withanarmature 99 f c For the purposeof imparting longitudinal; movement to the indexing-bar 72, which motion vduring certain phasesoftheoperati'on of my lmproved apparatus. is supplemented by a simultaneous,transverse movement of the said bar to cause the sameand the indexingfingers 74 and 7 5 to move in a circularpath,

V :I abut the right-handfend of the said bar v againstthe periphery-013a disk-like cam 76 mounted upon the extreme upper. end ofthe cam -sha ft59 before referred 'tow v "Togprovide for moving'the indexing-bar transverselyin consonance with its transverse movement, I employ a cup-shaped cam 7 7 wh1ch-1s engaged by a roller 7 8'mountedupon the outer end of a-lever-arm'7 9 mounted upon theextreme right-hand end of a rock-shaft 80 whichparallel's the saidindeXing-bar and the complementary rock-shaft -64 before d es scribed.

Near' each of its-respective opposite ends the said rock shaft 80 is provided I with 'two upstanding-arms 81 carryingat their upper ends set-screws 82 locked in adjusted position by lock-nuts 83 and having their forward against the periphery of the cam 76b'y a pair of-diagonallysarranged'springs 85 which also 7 act through the'me-diary-of the arms 81 and rock-shaft 80 to hold the roller? 8 in engagement with the cam-surface of the'cam- 7 7 j -For the purpose of holding the startingand-stopping bar 48 in itsleft-hand position, so as to hold the starting-and-stopping fin gerss52-out of engagement with the balance-- wheels 19 in the respective test-movements and also to hold-a stop finger out 'of'engagee I to ment with thebalance-wheel86 oi the masterm-ovement 87 to be later-described, I provide a the saidstarting-and-s'topping bar with a depending latch-pin 88 semicircular in cross-- section'and, adapted to co act with asimilarly-shapedlatch-pin 89 upstanding from a transversely arranged latch-bar '90 which is pivoted about midwayof its length as at 91 andalso carries at its front end adjacent the latch-pin 89 a pivotal guard-dog92 oscillating in the horizontal plane upon the upper face of the said latch-bar and of the same height as the said latch-.pi'n 89 against which.

' 'volving contactfinger 114, current will fiow through an velectro-magnetic:relayboil 120 u it is normally held by a-spring 93.

- The rear reach of the latch-bar'90 carries-a- Q block 94 o'finsulating material which in turn 7 carries upon one of its sidefacesia metallic switch-plate 95; which isadaptedpto-cl'ose the.

which'the said contact finger 114 spring contact-arms 96 and 97 mounted upon an insulated base 98---so as to be normally in- 'sulated from each other. and-havingtheir lower ends inwardly turnedfor contactwith.

the .plate 95. Thelatch-bar 90 isalso proacted upon by apair of electro-magnets 100 controlled by the master-movement 87 to releasethe starting-and-stopping bar 48 to the action of fitslsprings-68 for the purpose of stopping both the master-movement and the several test-movements at the expiration of a predetermined test 'period.

' The mastermove1nent 87 before referredto,' likethe tesbmovements, is a time-move ment especially selected for its accuracyand comprises-the "usual; train 101 drivenby a main-wheel 102 ;mounted upon the mainarbor 103 which also carries a drum 104 around which .is wrapped a driving-cord 105 one end of 'whichis provided-with a driving weight =106 and theoppositeends with a relatively small'tension weight 107. The

said cord runs over idler-pulleys 108mount5 ed upon the horizontalrod 34 before referred F-or the purposeof energizing the magnet v100iatthetermination of a predetermined test and alsogthebalance-wheel of the mastermovementso that; the degree of correctness of, the balance-wheelunits being tested may 1 be determined by the indications of the sev-,

eral pointers 39 and 40; I providethe upper end of the third wheel arbor 109 of-the 1 nas-- tor-movement witha disk 110 of insulating material in which :is mounted, so as to;be in-- adapted to'engage andelectrically connect a stationary contact-finger 113 and "a f rotary contact-finger-ll4 whi'ch latter isYmounted V 1 inametallic disk 1-15 securedto the upper end of the; escapement wheel arbor. 116 {with trical contact 1 is in elec-i to ablo'ck 117; of insulating material mounted the stationary;-contactfinger 113- and the rewhich thus energizedwill draw its armature 121toward it so as toiclose a circuitthrough theI-elect o gnets Q0.. 0 aus 5. he t r to.

swing the latch-bar 90 and release the starting-and-stopping bar 48 to the action of its springs 68 for the purpose of stopping all of the movements;

'For the purpose of starting and stopping the balance-Wheel 86 of the master-movement 87 I provide a starting-and-stopping arm 122 carrying at its forward end a yielding starting-and-stopping finger 123 and corresponding generally to the starting-and-stopping arms 47 of the test-unitsbut instead of being frictionally coupled to the starting-and-stop, ping bar 48 it is frictionally pivoted by means of a stud 124 to the forward end of a short link 125 which in turn is frictionally pivoted at its'rear end to the upper face of the framepiece.

The upper end of'the stud 124 carries a roller 126 entering a groove 127 extending parallel with the startingand-stopping bar 48 and formed in a block'128 secured by screws 129 to the under face ofthe said starting-andstopping bar 48. From this arrangement it will be seen that when the starting-and-stopping bar 48 moves longitudinally it will not affect the starting-and-stopping arm 122 owing to the free movement of the stud 124 in the groove 127. However, when the said starting-and-stopping bar 48 moves transversely the "roller 126 will he moved by the walls of the groove 127 and correspondingly move the starting-'and-stopping arm 122 together with its s'tarting-and-stopping finger 123.

For the purpose of restoring the startingand-stopping arm 122 to its normal position in which its finger 123 engages the balancewheel 86 I provide a short forwardly-extend ing bracket 130 secured at its rear end by screws 131 to the upper face'of the startingand-stopping bar "48 and provided at'its forward end with a re-setting pin 132 adapted to engage the left-hand end of the starting-andstopping arm 122. I

In the operation offmy improved testing apparatus after the completion of one test cycle and when the parts arein their at rest positions in which they are/shown in Figs. 1 to 8 inclusive and Fig-10, the operator'rocks in turn the starting-and-stopping arms 47 of the several test-movements from the position shown by fulllines in Fig. 5 to'the position in whichit is shown-in broken'lines therein thus disengaging the starting-and-stopping finger 52 from the periphery of thefunit just tested and simultaneously causing the backofi finger 44 to engage the ratchet-Wheel 27 and move the same slightly in a reverse direction from its normal travel a'nd'so as to relieve the gear-train 24 of the test-movement movements shoWn,.sub.-divisions of the graduations surrounding the openmgs' 41 are represented by the graduations surroundlng the opening 41 the relatively fast-moving pointer 40 completing one revolution during the movement of the slow-moving pointer 39 from one graduation to the next. If the pointers indicate that the balance-wheel unit is accurate, or so nearly so that a correction can be made bythe operator without another trial run,.the hair-spring of the said unit is bent at a predetermined point and the unit removed from the test-movement and re. placed by another balance-wheel unit to be tested The operator then moves to the next testmovement and proceeds as above until all of the balance-wheel units just tested have been checked and if satisfactory removed from the unit and if not readjusted and left inplace for another trial run.

then all of the balance-Wheel units in 'he various test-movements have thus received attention the apparatus is in'readiness for a test run. To effect this'the operator swings a yol:eshaped switch-operatingteeth 138 out upon the periphery of the cam 77, effects t rotation of the cam-shaft 57 together with the four cams 58, 61,76 and 77 thereon, in a clockwise direction.

Immediatelythe cam shaft 59 starts its rotation the cam 58 will act to move the starting-and-stopping bar'48 from right to left'with the effect of moving the starting and-stopping arms 47 of the several testmovements against their respective stop-pins 56, so that the said arms are moved from an inclined position indicated by broken lines in Fig. 5 to a position perpendicular to the bar 48 asindicated by full lines in the same figure. ing-and-stopping arms permits the back-off fingers 44 respectively actuated thereby to move out of engagement with their complementary ratchet-wheels 27 and thus release the several trainsr24 to the action of their driving-weights 31. I

The cam 58 now permits the springs 68 to move the startingand-st'opping bar from left to right with the effect of re-engaging the starting and-stopping fingers 52 with their This straightening up of the startupon the upper face. of the pivotal guard-do g 492' which thus prevents the latch-bar 90 from swinging so as to close the circuit through the fingers 96 and .97. I I Y It is to be noted that during the movement of, the starting-and stopping bar 48 I from f right to left and from left to right'the starting klldstopping. arm'122'has not been moved as have the, several starting-and-stopping arms 4;, ow ng to theslotted connection be- ;tween Itheni and the said'starting-and stopping bar, so that the master-movement 87- remains at rest during there-setting. ofv the arms 47. of the test-movements. I

As 's o-on as the starting-and-stopping bar has completed itsmovement from left to right the cam 7 Swill act to move'the indexing bar 72ashort distance from right to left so that the indexing-fingers 74 and 751are moved out of' the notches48 andinto the 'cir-.

.eular sight-openings 4 1 and-.41. The cam 76continues to urge the indexing-bar 72 from rightto left, but at this particular time the cam 77 colnes intofaction to causeth e said ment coupled with the longitudinal movement imparted by the cam 76 and the springs 'indexingban to move rearward, which move- I '85,: will causethe inde ing-barto move antipointers n the .i c lvi ofthe p a- 5 clockwise in a circularpath together with I H one quarter turns, thus causing the said imgerstorotate the pointers 39 and40 and move -.tl1em into registration with the zero marlis' upon the edge of the r respective open1ngs41.

the indexing-fingers 74 and 7 5 for one and amt-41f After the indexingebarand fingers 43 and out of the path of the said i 'Qtion justaheve describedthe cam 61 actsto permit starting-andstopping bar 48 to nioverearward a short distance'unde'r the f urge of it s'fsp rings68 with the effect ofwiping the several starting-and stoppingg fingers 52 across the balance-wheels 19 of the respec- 7 H. ILIII 5Q.

tive; test-movements and, correspondingly.

1 moving the starting and-stopping finger 123 ljz 'ac ross the.balance-wheel 86 of the mastermovement so as to simultaneously start all.

of the said movements. This rearward move- "55 its latch-pin 88 rearward out of line with the.

ment of the starting-and-stopping-barmoves ,rearedge ofthe "dog 92 as shown in Fig. 10%

v ,The cam 58ii0wactsto move the starting-. I and-stopping bar iii-om right tolefta distancef snfii oient tomove thelatch-pin 88 to the left "of the complementary latch-pin 89 asshoWn i .in Fig. 10; thus permitting the forward. end

. of the said 1atch=bar to rise, by virtue of the I .sexcess;weightlat*its opposite end, thereby e ise eathepenetrateQW ly- 'turned lower ends of the c onta ct-arms 96 and 97 so as to electrically connect them, I The bar 48 is now moved forward by the cam 61 sons to virtually hook thepin 88in engagement with the left face of the .pin'89. (Fig.

10) "so that the saidbar is thereby latched in its ljeft-handposition against the counterurge ofits springs 68. I During this last mentioned movement of the bar 48andpin 88 the dog 92 has been swung forward against 'the tension ofitsispring 93,. w i

'fAt the conclusion of thelatching of the starting-andstopping bar in it's; left-hand position, the 1notor 135, and hence. the camshaft and" cams 58, 61, 76 and 77 coupled thereto, is. automatically stopped'by a stoppin139which projects upward from the cam 7 6 and engages an extension 140 uponthe lower arm of the yoke-shaped switch operat ing; handle 133 so. as to turn the same into its off position.

nism within the .switch-bOX 134; and shuts off the currentjto the motor. I All of, the .testmovements, however, as well asthe'mastermovement, continue, to operate under the urge ofthe driving-weights 31' and .106 respectively. i

.85 The automatic. movement I of the said handle operates the SWltCll-l'llGCllfii v Electrical connection having ,been.-imade .between the contact-fingers 96- and 97 by'the movement of-the latch-bar -as above do serib'ed; the relatively slow rotation o f the' cODtflQt-fingers 1'11 and 112 with the "thirdwheel arbor 109 andfthe ,relatively fast rota: tion of the contact-finger 114 with the escape- '1n e'nt--wheel arbor 116 will, in a predetermined interval; arrive at a position where I the finger 111 will engage-with the finger- 118 and the finger112will engage with the finger 114, thus closing a circuitthrough 96 an'd'97 and'the plate 95, causing thesaid relay to attract its armature 121 and sorts to close an electric circuit through the' nagnets 100.

with the effect of simultaneously disengaging the latch-pin 89 from the lat ch-pin188,and of movingthe contact-plate'95 out of engage- .ment with the inwardly-turneden'ds of the contact-arms 96 and 9.7 thereby breaking the 1 cireuit through thesaid magnet as well as; 1 through the'contactfingers of the .mastermovement as will be apparentfromthe dia-- This. energization ofthemagnetlOO will lift the rear end ofthe latch-bar 90 and correspondingly lower '.t he outer end (thereof grammaticwiring scheme shown in Fig; 11;

As soon as the latch pin 89; is disengaged from the pin 88, of the starting-andstopping 1 bar 48 the same will be immediately snapped from'left to right by its springs 68, withthe effect of moving the several startingrand' stopping fingers 52 into engagement. with their respective balance-wheels and also of were the s ar-121. 32. 9. WQYQ1119P1111 105' the very sensitive relay- :Yia the fingers the stoppage of all of the test-movements as Well asthe master-movement.

' Vith the machine thus at rest the operator proceeds to observe the degree to Which each of the several balance-Wheel units just tested have varied from a predetermined standard,

and if Within a prescribed range the hairsprings are bent at a predetermined polnt and V the unit removed from the machine and'replaced by another balance-Wheel unit'to be tested. Such of the balance-Wheel units just tested as do not operate Within a prescribed range are re-set and left in place for another test. One cycle of the operation of my improved apparatus is thus complete and the parts are in position to again move through the various phases of the cycle previously described.

1. An apparatus of the class described, comprising a test-movement adapted to receive a balanceWheel-unit to be tested and provided With an indicator for registering the oscillations of the said unit during a predetermined test-period; a master-movement; a stop-member 'engageable With running parts of both of said movements; and auto-' matic means controlled by the said master movement for causing the said stop-member to simultaneously stop both movements at the terminationof a predetermined test-period.

2. An apparatus of the class described,

, comprising a test-movement adapted to receive a balance-Wheel-unit to be tested and provided With an indicator for registering the oscillations of the said unit during a predetermined test-period; a master-movement; a stop-member engageable With running parts of bothot said movements; and automatic ele ctro-magnetic meanselectrically controlled by the said 'master-movement for causing the said stop-member to simultaneously stop both movements at the termination of a predetermined test-period.

3. An apparatus of the class described, comprising a test-movement adapted to receive a balance-Wheel-unit to be tested and provided with an indicator for registering the =oscillations of the said unit during a pre determined test-period; a master-movement; a; stop-member engageable W1 th running parts 01": both of'said movements; a prime-mover; automatic means operated by the said primemover for disengaging the said stop-member from the said movements; and automatic means controlled by the said master-move ment for causing the said stop-member to simultaneously stop both movements at the termination of a predetermined test-period.

4-. An apparatus of the class described,

2 comprising a test-movement adapted to re+ movements at the termination of a predetermined test-period. I

5. An apparatus ot-the class described, comprising a test-movement adapted to receive a balance-wheel-unit to be tested and provided with an indicator for registering the oscillations of the said unit during a predetermined test-period; a prime-mover; an automatic resetting-member operable by the said prime-mover to return the said indicator to its starting'position; a master-movement; a stop -member engageable with running parts of both of said movements; and automatic means controlled by the said master-movement for causing the said stop-member to simultaneously stop both movements at the termination of a predetermined test-period.

6. An apparatus ofthe class de'scribech comprising a test-movement adapted to receive a balance-Wheel-unit to be tested and provided with an indicator for registering the oscillations ofthe said unit during a predetermined test-period; a prime-mover; an automatic resettingdnember operable by the said prime-mover to return the said indicator to its starting position; means operated by the said prime-mover forimparting both rotary and rectilinear movement to the said reset 1 5 ting-member; a master-movement; a stopmember engageable with running parts otboth of said movements; and automatic means controlled by the said master-movement for causing the said stop-member to simultaneously stop both movements at the termination of a predetermined test-period, p

7. An apparatus of the classdescribed, comprising a test-movement adaptedto receive a balance-Wheel-unit tobe tested and provided with complementary coordinated fast and slow indicators for registering the oscillations of the said unit during a predetermined test-period; a master-movement; a

'sto memberen 'a eable With runnin oarts 120,

b b c l oscillations of the said unit during a pre determined test-period; a master movement a stop-member engageable with running parts of both of said movements;'andautomatic electro-magnet ic'1neans electrically controlled by the said master-moyeme'n't for causing-the ice said stop-membertdsimultaneously stop both movements at the'termination of a predetermined test-period. i Y

' v 9. An oapp'aratus of the class described, comprising a test-movement adapted to reoeive.abalance-Wheel-unit to be tested and provided with complementary coordinated fast and slow indicators for registering the foscillati onsof the said unit during a pre'de-' "termined test-period; a prime-mover; an automatic resettiriganember operable by the said primemover to return the said indicators tothei'r starting: positions"; a mastermovement; 'a stopaneinber engageable with 'runningparts of both of said'movements;

and automatic meanscontrolledby thesaid master-movement for causing'the" said stop- I meinberito simultaneously stop both movements at the termination of a predetermined" testperiod. v

10. An apparatus of the classdescribed, comprising a test-movement adapted to re ceive a balance-wheelnhit tobe tested and provided with complementary coordinated fast and slow indlcators for registering the oscillations of the said unit during a predetermined test-period; a prime-mover; an

automatic resetting-member operable by the said prime-mover to return the said 1nd1cators to their starting positions; means operated by the said prime-moverior imparting both rotary andrectilinearmovement to the said resetting-member; a master-movement; a stop-member engageable with running Jarts of both of said movements' and automatic means controlled by the said masterQ movement for causing the said stop-member to simultaneously stop both movements at the termination of a predetermined test-period.

11. An apparatus of the class described,

comprising a test-movement adapted to receive a balance-wheel-nmt tobe tested and provided Withan indicator for registering the oscillations of the said unit during a-pre determined test-per1od; a master-movement;

a stop-member engageable With running parts of both of said movements;yielding means normally urgingthe said stop memher into engagement With-the said running parts; and a latch-mechanism adapted to hold the said stop-member'out o1"- engage-- ment with the said runnlng parts against the;

counter-urge of the said yielding means and controlled by the said master-movement for releasing the said stop-member to s1multa-' neously stop both movements at the termina tion of a predetermined test-period. 12. An apparatus of the class described,

comprising a test-movement adapted to re the said running parts; a latch-mechanism adapted to releasably hold the said stop member out of engagement with the saidrunning parts; an electro-magnet foroperating the said latch-mechanism; and connections between the said switch-mechanism and the said magnet for energizing the latter to operate the latch mechanism and release the said stop-member to simultaneously stop both movements at thetermination' of a'predetermined test-period.

13. A n' apparatus of the class described,

comprising test-movement adapted to re ceive a balance-Wheel-unit to be tested and provided 'With an indicator for registering the oscillations of the said unit durin a re determined test-period a master-movement a stop-member engageable W1i3l1-IuI1I11I1g 32tItS of both of said movements and auto- 'matic means including a releasing-magnet and a relay electrically controlled by the said master-movement for causing, the said stop- "me'mberto simultaneously stop both movements at thetermination of a predetermined test-period.

14. An apparatus of the classrlescribech comprising a test movement adapted to receive a balance-,WheeLunit to be tested and provided With an 11161031501 for registering the oscillations of thesaid unit during a pre determined test-period a master-movement;'?1

a switch-mechanism operated-by the said masteranovement and including a slow-movand automatic electro-magnetic means controlled by the'said switch-mechanism for caus ng the sa1d:-stop:-1nember to si'multa neously stop 'both movements'atthe termn lng. contact and a complementary fast-movmg contact; a stop-memberengageable Wlilll running parts of both of said movement-sf nation of a predeterminedtest-period.

.l 15. An apparatus, of the class described,

comprising a test-movement adapted toi'eceive a balance-Wheel-unit tobe tested and provided with an "indicator for registering the oscillations of the said unit during a prodetermined test-period; a master-movement;

a switch-mechanism operated by the said master-movement and including a slow-movine'lcontact' and a complementary fastanovng contact, a stop-memoer engageable wlth running 5 parts ofrboth: of said movements;

automatic means for disengaging the ,said

stop-member from the said movements and automatic electro magneticr means controlled by-fthe' said switch-mechanism.afor:causing the said stop-member to simultaneously stop both movements at the termination of a predetermined test-period. 1

16. An apparatus of the class described, comprising a test-movement adapted to receive a balance-wheel-unit to be tested and provided with an indicator for registering the oscillations of thesaid unit during a predetermined test-period; a master-movement; a stop-member provided with a stop-finger engageable with a running part of the mastermovement, and a second stop-linger engage able with a running part of the said testmovement, the latter finger being frictionally coupled to the said stop-member; and automatic means controlled'bythe said mastermovement for causing the said stop-fingers to simultaneously stop both movements at the termination of a predetermined testperiod.

17. An apparatus -of the class described,

comprising a; test-movement adapted to re ceive a balance-wheel-unit to be tested and provided with an indicator for registering the oscillations of the said unit during a predetermined test-period; a master-movement; a stop-member provided with a stop-linger engageable with a running part of the master-movement, and a second stop-finger engageable with a running part of the said testmovement, the latter finger being frictionally coupled to the said stop-member; means constructed and arranged to impart to the said stop-member in the order named a longitudinal movement, a transverse movement and a second longltudlnal movement; an abutment positioned to be engaged by the lastmentioned stop-finger for resetting the same when the said stop-member 1S moved longitudinally; and automatic means controlled by the said master-movement for causing the said stop-fingers to simultaneously stop both' movements at the termination or a predetermined test-period.

18. An apparatus of theclass described, comprising a test-movement adapted to receive a balance-wheel-unit to be tested and provided with an indicator for registering the oscillations of the said unit during a predetermined test-period; a master-movement;

a stop-member engageable with running. parts of both of said movements; ylelding' means normally urging the said stop-member into engagement with the said running parts; means constructed and arranged to impart to the said stop-member in the order named a longitudinal movement, a transverse movement and a second longitudinal movement; a

' latch-mechanism adapted to hold the said stop-member out of engagement with the said running parts against the counter-urge of the said yielding means andcontrolled by the said master-movement for releasing the sald stop-membe1 to simultaneously stop both movementsatthe-termination of a predeter mined test-period; and a guard-dog arranged to prevent the said latch-mechanism from acting to latch the said stop-member during the first mentioned longitudinal movement of the latter.

'19. An apparatus of the class described,

tro-magnetic means controlled by the said switclrmechanism for causing the said stopmember to simultaneously stop both movcments at the termination of a predetermined test-period.

In testimony whereof, I have signed this specification FREDERICK FRANZ. 

